CVE-2023-46474
Published: 11 January 2024
Summary
CVE-2023-46474 is a high-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Sigb Pmb. Its CVSS base score is 7.2 (High).
Operationally, ranked in the top 1.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2023-46474 is an unrestricted file upload vulnerability in PMB version 7.4.8. The flaw resides in the start_import.php component and is tracked under CWE-434. An authenticated user can upload a crafted PHP file that the application fails to sanitize or restrict by type, enabling subsequent execution of attacker-controlled code on the server.
An attacker with administrative credentials can exploit the issue over the network to achieve arbitrary code execution and privilege escalation. The CVSS 7.2 score reflects the high impact on confidentiality, integrity, and availability once the malicious file is processed, although exploitation requires prior high-privileged access.
Public references include a proof-of-concept repository demonstrating the upload sequence. The current EPSS of 0.7269 indicates sustained exploitation interest since disclosure, with no material rise from a lower baseline observed. No vendor advisory or patch information is provided in the listed references.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-50689
Vulnerability details
File Upload vulnerability PMB v.7.4.8 allows a remote attacker to execute arbitrary code and escalate privileges via a crafted PHP file uploaded to the start_import.php file.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Requiring identifiable owners for portable devices reduces the attack surface for unrestricted uploads of dangerous file types via anonymous media.
Dangerous file uploads can be detonated in the chamber to determine malice before any production write or execution occurs.
Prevents unrestricted writing of arbitrary or malicious firmware by keeping hardware write-protect enabled except under tightly controlled manual procedures.
Scans files from external sources on download/open/execute, blocking unrestricted uploads of dangerous file types.